Unloading device



Oct. 28, 1952 F J RYNDERS 2,615,544

UNLOADING DEVICE Filed March 15, 1950 2 SHEETSSHEET 1 l0 i w /8 l 13 I SZ /7 t /5 II 2* V yo 2] L1 INVENTOR FRANK J. RYNDERS Oct. 28, 1952 F..1. RYNDERS 2,615,544

UNLOADING DEVICE Filed March l5, 1950 2 SHEETS--SHEET L' wnnm /6 K l? 2/20 \NVENTOR FRANK J. RYNDERS Patented Oct. 28, 1952 err UNLOADING DEVICEFrank J. Rynders, Milwaukee, Application March 15, 1950, Serial N0.149,782

1 Claim. (01. 193-33) This invention appertains to loading andunloading'and more particularly to a novel skid for facilitating themoving of heavy objects from one height to another.

One of the primary objects of the invention, is to provide a light,portable skid of an exceptionally rugged and durable construction, whichcan be efficiently used. for sliding articles from trucks and the like.

Another'salient object of the invention is to provide a skid embodying apair ofsections slidably connected together, so that the same can beextended to form a full sized device for operative connection with atruck, or collapsed into a small compass for storage, when not in use.

A further object of the invention is to provide a locking device forholding the sections in their extended operative position againstaccidental movement relative to one another, said locking device beingalso automatically movable to a released position upon the mere turningover of the skid, with its lower face uppermost, whereby the skid can beeasily collapsed.

A further important object of the invention is to provide noveltelescoping rails on the longitudinal sides of. the sections, said railsfunctioning as guides for articles being moved up or down theskid,

. (A still further object of the invention is to provide a novelunloading device of the above character, which will be durable and(efficient in use,.

one that will be simple and easy to manufacture and one which can beplaced upon the market at a reasonable cost.

With these and other objects in view, the invention consists in thenovel construction, arrangement and formation of parts, as will behereinafter more specifically described, claimed and illustrated in theaccompanying drawings, in which drawings,

Figure l is a side elevational view of the improved skid, showing thesame in use with a truck for unloading the same.

Figure 2 is a top plan view of the skid with parts thereof broken awayand in section to illustrate structural detail.

Figure 3 is a longitudinal, sectional View through the skid taken on theline 33 of Figure 2, looking in the direction of the arrows.

Figure 4 is an enlarged transverse sectional view through the skid takenon the line l4 of Figure 3, looking in the direction of the arrows.

Figure 5 is a fragmentary detail longitudinal sectional view, taken onthe line 55 of Figure 4, looking in the direction of the arrows,illustrating one of the lockingdevices in its operative position."

Figure 6 is a view similar to Figure 5,-but showing the skid turned overwith its lower face uppermost and the locking device in its inoperativereleased position.

Figure '7 is a detail, transverse, sectional view through one pair ofside rails, showing thelocking device, the section'being taken on theline 1-1 of Figure 5.

Figure 8 is an enlarged, detail side elevational View of one of thelocking pins.

Referring to the drawings in detaiLwherein similar reference charactersdesignate corresponding parts throughout the several views the letter Sgenerally indicates the novel skid, and T atruck, with which the samecanbe used. Obviously, the truck T forms no part-of the presentinvention and can be considered of any type or character. r

The skid S comprises an outer section it and an inner telescopingsection II, and each section is constructed somewhat along the samelines.

As illustrated, the section it, includes a pair of longitudinallyextending spaced parallel side rails l2, which are preferably formedfrom tubing of the desired strength; The rails l2 are rigidly connectedtogether adjacent to their opposite ends by cross straps l3 and 14'.These straps are disposed below the rails i2, and have formed on theiropposite ends, upturned feet [5, which can be welded or otherwisesecured, as at It, to the lower central faces of the rails l2. The crossstraps l3 and I4 are also rigidly connected together by spaced parallellongitudinally extending fiat bars ll, which form the body ofthe skidand these bars I! are rigidly secured to the cross strap l3 by welding,rivets or the like. The outer-ends of the fiat bars ll, have formedthereon short depending hooks or legs I8, for a purpose, which will belater set forth.

The section H also includes a pair of spaced parallel side rails 59 andthese rails can also be formed from tubing of the desired gage and 1strength; The rails l9 telescope within the rails i2 as can be clearlyseen by referring to Figure 2 I of the drawings. The outer ends of therails 49 are rigidly connected together by a cross strap 26, which isdisposed below the side rails. The

outer ends of the cross strap 20 have formed thereon upturned feet 2|,which are welded or otherwise rigidly secured to the lower face of therails l9. Rigidly secured to the cross strap 20, are spaced parallellongitudinally extending flat bars 23 and these bars are so spaced as toslid.-

ably fit between the fiat bars I? of the section 10 and the bars 23slide over and engage the inner cross strap 14 of the section II].

In order to form stops and guides for the sections l and II, the innerends of the bars 23 have riveted or otherwise fastened thereto, guideand stop plates 24 and these plates 24 are of such a width as to extendover the bars l1. Obviously, when the sections In and II are pulledapart to their desired full open position, the plates 24 will abut thecross strap 14 and prevent the pulling apart of the sections. Fastenedto the upper faces of the flat bars 23, by the same rivets, whichfastened the plates '24, are top guide plates 25. These top guide platesalso extend beyond the side edges of the bars 23 and engage the upperfaces of the bars 11. The front ends of the plates 25 are downturned asat 26 so as to engage between the bars I1.

In order to lock the sections 10 and H in their extended open positionagainst accidental collapsing, novel locks 21 are provided for thesections 10 and I l. The locks are carried by the side rails of the skidand each includes a lock pin or tumbler 28. The innerends of thetumblers are carried by cylindrical weights 29 and the pins or tumblerscan be threaded into said weights. The outer ends of the tumblers extendbeyond the weights, as best shown in Figures 5, 6 and 7. The rails 19 ofthe section II are provided with openings 33 and the pins or tumblers 28are of such a length as to normally fit in said openings. The openings30 are adapted to register with openings 3| in the side rails l2, whenthe sections are in their full open position. When the skid is in useand thesections Ill and H are slid apart to their full open position,the pins 28 will fall into the openings 3| and consequently this willhold the sections against relative-movement.

When it is desired to collapse the sections, then it is merely necessaryto turn the skid over so that its lower face will be uppermost and theweights 29 will fall and pull the pins '28 from out of the openings 3i.This will permit the sections to he slid toward one another. As shown inFigurel, of the drawings, the skid can be effectively used for unloadingtrucks, and is particularly adapted for sliding heavy objects from atruck into a building through an open window. The hooks or legs 18 willengage sides of the truck and prevent slipping of the skid.-

Owing to the arrangement of the sections l0 and l I, relative to theflat bars I! and 23, the rails are disposed above the said bars andhence function as guides for objects being slid on the skid.

From the foregoing description, it can be seen that I have provided anovel skid of exceptionally durable and simple construction, which canbe readily collapsed into a small compass so that the same can bereadily carried on a truck.

Changes in details may be made without departing from the spirit or thescope of my invention, but what I claim as new is:

A skid for facilitating the unloading of trucks and the like comprisinginner and outer slidably connected sections, each of said sectionsincluding hollow side rails with the rails of the inner sectiontelescoping within the rails of outer section, and means forautomatically locking the sections in an extended operative positionagainst accidental movement relative to one another includinglongitudinally extending weightsloosely fitted in the hollow rails ofthe inner section, said rails of the inner section having openings,right angularly extending tumblers secured to the weights and movable inthe openings at all times, the walls of the openings forming guides forthe tumblers and for preventing longitudinal shifting of the weights,the side rails of the outer section also having openings therein adaptedto register with the openings in the rails of the inner section when thesections are in their full extended operative position, whereby saidtumblers will ride into the openings of the side rails of theoutersection, the weights being of a smaller diameter than the rails, wherebywhen the skid is turned over with its lower face uppermost the tumblerswill ride out of the openings in the rails of the outer section.

FRANK J. RYNDERS.

REFERENCES CITEl) The following references are'of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 399,050 Kmball 'Mar. 5, 1889501,659 Patterson July'18, 1893 1,307,199 Heyer .June 1'7, 19192,449,722 Saathofi Sept. .21, 1948

